﻿// 
//    Copyright 2010 The JaernCloud Project
// 
//    Licensed under the Apache License, Version 2.0 (the "License");
//    you may not use this file except in compliance with the License.
//    You may obtain a copy of the License at
// 
//        http://www.apache.org/licenses/LICENSE-2.0
// 
//    Unless required by applicable law or agreed to in writing, software
//    distributed under the License is distributed on an "AS IS" BASIS,
//    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
//    See the License for the specific language governing permissions and
//    limitations under the License.
// 
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using JaernCloud.Language.Compiler.Types;
using System.Collections.ObjectModel;

namespace JaernCloud.Language.Runtime.Scopes {
    
    public abstract class AbstractNodeObjectScopeProvider : INodeObjectScopeProvider {

        protected Dictionary<NodeTypeScope, INodeObjectScope> _scopes = new Dictionary<NodeTypeScope,INodeObjectScope>();

        public IEnumerable<INodeObjectScope> Scopes {
            get {
                foreach(INodeObjectScope scope in _scopes.Values) {
                    yield return scope;
                }
            }
        }

        public INodeObjectScope GetNodeObjectScope(NodeTypeScope typeScope) {
            INodeObjectScope scope;
            if (_scopes.TryGetValue(typeScope, out scope)) {
                return scope;
            } else {
                throw new NotSupportedException(typeScope + " is not supported");
            }
        }

        public abstract INodeObject<IScopedNodeType> Get(IScopedNodeType nodeType, INodeObjectGenerator nodeObjectGenerator);

        public abstract INodeObject<IScopedNodeType> Put(IScopedNodeObject<IScopedNodeType> nodeObject);

    }
}
